PA07 [APEX]

FET INPUT POWER OPERATIONAL AMPLIFIERS; FET输入功率运算放大器


型号：	PA07
厂家：	CIRRUS LOGIC
描述：	FET INPUT POWER OPERATIONAL AMPLIFIERS FET输入功率运算放大器运算放大器输入元件
文件：	总4页 (文件大小：249K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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FEATURES

• LOW BIAS CURRENT — FET Input

• PROTECTED OUTPUT STAGE — Thermal Shutoff

• EXCELLENT LINEARITY — Class A/B Output

• WIDE SUPPLY RANGE — ±12V TO ±50V

• HIGH OUTPUT CURRENT — ±5A Peak

8-PIN TO-3

PACKAGE STYLE CE

APPLICATIONS

• MOTOR, VALVE AND ACTUATOR CONTROL

• MAGNETIC DEFLECTION CIRCUITS UP TO 4A

• POWER TRANSDUCERS UP TO 100kHz

• TEMPERATURE CONTROL UP TO 180W

• PROGRAMMABLE POWER SUPPLIES UP TO 90V

• AUDIO AMPLIFIERS UP TO 60W RMS

TYPICAL APPLICATION

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DESCRIPTION

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The PA07 is a high voltage, high output current operational

ampliﬁer designed to drive resistive, inductive and capacitive

loads. For optimum linearity, especially at low levels, the out-

put stage is biased for class A/B operation using a thermistor

compensatedbase-emittervoltagemultipliercircuit. Athermal

shutoff circuit protects against overheating and minimizes

heatsink requirements for abnormal operating conditions. The

safe operating area (SOA) can be observed for all operating

conditions by selection of user programmable current limiting

resistors. Both ampliﬁers are internally compensated for all

gain settings. For continuous operation under load, a heatsink

of proper rating is recommended.

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Negates optoelectronic instabilities

Lead network minimizes overshoot

SEQUENTIAL POSITION CONTROL

Thishybridcircuitutilizesthickﬁlm(cermet)resistors,ceramic

capacitors and semiconductor chips to maximize reliability,

minimizesizeandgivetopperformance.Ultrasonicallybonded

aluminumwiresprovidereliableinterconnectionsatalloperating

temperatures. The 8-pin TO-3 package is hermetically sealed

and electrically isolated. The use of compressible washers

and/orimpropermountingtorquewillvoidtheproductwarranty.

Please see “General Operating Considerations”.

Position is sensed by the differentially connected photo

diodes, a method that negates the time and temperature

variations of the optical components. Off center positions

produce an error current which is integrated by the op amp

circuit, driving the system back to center position. A momen-

tary switch contact forces the system out of lock and then the

integrating capacitor holds drive level while both diodes are

in a dark state. When the next index point arrives, the lead

network of C1 and R1 optimize system response by reducing

overshoot. The very low bias current of the PA07 augments

performance of the integrator circuit.

EQUIVALENT SCHEMATIC

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EXTERNAL CONNECTIONS

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NOTE: Input offset voltage trim optional. R_T= 10KΩ MAX

APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com

ABSOLUTE MAXIMUM RATINGS

SPECIFICATIONS

PA07 • PA07A

SUPPLY VOLTAGE, +V_Sto –V_S

OUTPUT CURRENT, within SOA

POWER DISSIPATION, internal¹

INPUT VOLTAGE, differential

100V

67W

±50V

ABSOLUTE MAXIMUM RATINGS

INPUT VOLTAGE, common mode

TEMPERATURE, pin solder - 10s

TEMPERATURE, junction¹

±V_S

300°C

200°C

TEMPERATURE RANGE, storage

OPERATING TEMPERATURE RANGE, case

–65 to +150°C

–55 to +125°C

SPECIFICATIONS

PA07

TYP

PA07A

TYP

PARAMETER

TEST CONDITIONS²

MIN

MAX

MIN

MAX

UNITS

INPUT

OFFSET VOLTAGE, initial

OFFSET VOLTAGE, vs. temperature

OFFSET VOLTAGE, vs. supply

OFFSET VOLTAGE, vs. power

BIAS CURRENT, initial³

T = 25°C

.01

2.5

10¹¹

±2

±.25

1.5

±.5

µV/°C

µV/V

µV/W

pA/V

Fu^Cll temperature range

T = 25°C

Fu^Cll temperature range

T = 25°C

BIAS CURRENT,vs. supply

OFFSET CURRENT, initial³

INPUT IMPEDANCE, DC

T^C= 25°C

INPUT CAPACITANCE

T^C= 25°C

COMMON MODE VOLTAGE RANGE⁴

COMMON MODE REJECTION, DC

Fu^Cll temperature range

Full temperature range, V_CM= ±20V

±V_S–10

120

GAIN

OPEN LOOP GAIN at 15Hz

T = 25°C, R = 15Ω

1.3

MHz

kHz

GAIN BANDWIDTH PRODUCT @ 1MHz T^C= 25°C, R^L= 15Ω

POWER BANDWIDTH

PHASE MARGIN

T_C^C= 25°C, R_L^L= 15Ω

Full temperature range, R_L= 15Ω

OUTPUT

VOLTAGE SWING⁴

CURRENT, peak

Full temp. range, I = 5A

Full temp. range, I^O= 2A

Full temp. range, I_O^O= 90mA

T = 25°C

±V –5

±V^S–5

±V^S_S–5

SETTLING TIME to .1%

SLEW RATE

CAPACITIVE LOAD, unity gain

CAPACITIVE LOAD, gain>4

T^C= 25°C, 2V step

T^C= 25°C

1.5

µs

V/µs

Fu^Cll temperature range

Full temperature range

SOA

POWER SUPPLY

VOLTAGE

CURRENT, quiescent

Full temperature range

T_C= 25°C

±12

–25

±35

±50

THERMAL

RESISTANCE, AC, junction to case⁵

RESISTANCE, DC, junction to case

RESISTANCE, junction to air

TEMPERATURE RANGE, case

F>60Hz

F<60Hz

1.9

2.4

2.1

2.6

°C/W

°C

Meets full range speciﬁcations

+85

NOTES:

The speciﬁcation of PA07A is identical to the speciﬁcation for PA07 in applicable column to the left.

1. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to

achieve high MTTF.

2. The power supply voltage for all speciﬁcations is the TYP rating unless otherwise noted as a test condition.

3. Doubles for every 10°C of temperature increase.

4. +V and –V_Sdenote the positive and negative supply rail respectively. Total V is measured from +V_Sto –V_S.

5. Ra^Sting applies if the output current alternates between both output transistors^Sat a rate faster than 60Hz.

The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or

subject to temperatures in excess of 850°C to avoid generating toxic fumes.

CAUTION

2^{APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739}

TYPICAL PERFORMANCE

GRAPHS

PA07 • PA07A

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APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com

OPERATING

CONSIDERATIONS

PA07 • PA07A

GENERAL

Please read Application Note 1 "General Operating Con-

siderations" which covers stability, supplies, heat sinking,

mounting, current limit, SOA interpretation, and speciﬁcation

interpretation. Visit www.apexmicrotech.com for design tools

that help automate tasks such as calculations for stability,

internal power dissipation, current limit; heat sink selection;

Apex’s complete Application Notes library; Technical Seminar

Workbook; and Evaluation Kits.

2. The ampliﬁer can handle any reactive or EMF generating

load and short circuits to the supply rail or common if the

current limits are set as follows at T_C= 85°C:

SHORT TO ±V_S

C, L, OR EMF LOAD

SHORT TO

COMMON

±V_S

50V

40V

30V

20V

15V

.21A

.3A

.46A

.87A

1.4A

.61A

.87A

1.4A

2.5A

4.0A

SAFE OPERATING AREA (SOA)

The output stage of most power ampliﬁers has three distinct

limitations:

1. The current handling capability of the wire bonds.

2. The second breakdown effect which occurs whenever the

simultaneouscollectorcurrentandcollector-emittervoltage

exceed speciﬁed limits.

These simpliﬁed limits may be exceeded with further analysis

using the operating conditions for a speciﬁc application.

3. The output stage is protected against transient ﬂyback.

However, for protection against sustained, high energy

ﬂyback, external fast-recovery diodes should be used.

3. The junction temperature of the output transistors.

THERMAL SHUTDOWN PROTECTION

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The thermal protection circuit shuts off the ampliﬁer when

thesubstratetemperatureexceedsapproximately150°C.This

allows heatsink selection to be based on normal operating

conditions while protecting the ampliﬁer against excessive

junction temperature during temporary fault conditions.

Thermalprotectionisafairlyslow-actingcircuitandtherefore

does not protect the ampliﬁer against transient SOA violations

(areas outside of the T_C= 25°C boundary). It is designed to

protect against short-term fault conditions that result in high

power dissipation within the ampliﬁer. If the conditions that

cause thermal shutdown are not removed, the ampliﬁer will

oscillate in and out of shutdown. This will result in high peak

power stresses, will destroy signal integrity and reduce the

reliability of the device.

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CURRENT LIMIT

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Proper operation requires the use of two current limit resis-

tors,connectedasshownintheexternalconnectionsdiagram.

The minimum value for R_CLis .12Ω, however, for optimum

reliability it should be set as high as possible. Refer to the

“General Operating Considerations” section of the handbook

for current limit adjust details.

SAFE OPERATING AREA CURVES

The SOA curves combine the effect of these limits. For a

given application, the direction and magnitude of the output

currentshouldbecalculatedormeasuredandcheckedagainst

the SOA curves. This is simple for resistive loads but more

complex for reactive and EMF generating loads. However, the

following guidelines may save extensive analytical efforts.

¹Note 1. Power Design is a self-extracting Excel spreadsheet

available free from www.apexmicrotech.com

1. For DC outputs, especially those resulting from fault condi-

tions, check worst case stress levels against the new SOA

graph.

For sine wave outputs, use Power Design¹to plot a load

line. Make sure the load line does not cross the 0.5ms limit

and that excursions beyond any other second breakdown

line do not exceed the time label, and have a duty cycle of

no more than 10%.

For other waveform outputs, manual load line plotting is

recommended. Applications Note 22, SOA AND LOAD

LINES, will be helpful. A Spice type analysis can be very

useful in that a hardware setup often calls for instruments

or ampliﬁers with wide common mode rejection ranges.

This data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. All speciﬁcations are subject to change without notice.

4^{APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739}

PA07 [APEX]

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